RFR: JDK-8225321 Repeated use of {@systemProperty} in a file causes duplicate ids

[Hannes Wallnöfer]

Looks good!

Hannes

> Am 06.06.2019 um 01:14 schrieb Jonathan Gibbons <jonathan.gibbons at oracle.com>:
> 
> Please review a moderately simple change to have the standard doclet better support repeated instances of {@systemProperty} and {@index} in a single file.
> 
> The problem is that each use for a given name creates a new instance of an id for that name, leading to duplicate definitions for the id.  The fix is to make the occurrences unique by appending a suffix to the ids so that the ids become unique.
> 
> Although the bug was encountered with repeated `{@systemProperty}`, the fix addresses repeated `{@index}` as well.
> 
> -- Jon
> 
> JBS: https://bugs.openjdk.java.net/browse/JDK-8225321
> Webrev: http://cr.openjdk.java.net/~jjg/8225321/webrev.00/
>